Whether DB2 certification is "worth it" is a highly personal decision. My friends, professional peers, and I have benefited, but research the issue for your own satisfaction before committing to the effort. Check out certification trends and community at major certification websites like Cramsession.com, Certification Magazine, or CertifiedComputerPro. Investigate online job ads at Monster, Dice, and JustDB2Jobs. And join the online DB2 community at the DB2 Developer Domain, IDUG, or DBForums. Then, make your own decision about certification benefits and costs.
There are unwritten rules to successfully certifying with any product. Candidates who are aware of them prior to testing have a distinct advantage. I've included these DB2 certification secrets in this article. Happy testing!